Confirmed Exoplanet Discovered 2018

HATS-36 b

A gas giant orbiting the g-type yellow (sun-like) HATS-36, located approximately 2,793.3 light-years from Earth.

Key parameters at a glance

  • A radius of 12.92 Earth radii
  • A mass of 1,022.14 Earth masses
  • Surface gravity around 6.12 g
  • An orbital period of 4.175 days
  • Semi-major axis 0.0523 AU
  • Equilibrium temperature 1,203 K (930 °C)
  • Distance from Earth 2,793.32 light-years
  • Earth Similarity Index 0.130
  • Travel time at Voyager 1 speed 49,260,150 years

HATS-36 b Planet Profile

Physical Specs

Radius
12.92 R⊕
Radius (Jupiter)
1.153 R♃
Mass
1,022.14 M⊕
Mass (Jupiter)
3.216 M♃
Density
2.12 g/cm³
Surface Gravity
6.12 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.130
HZ Position Inner
Controversial No

Discovery

Year 2018
Method Transit
Facility HATSouth
Telescope 0.18 m Takahashi Epsilon Astrograph

Size rank in cohort

Rank by radius

#1010of 1771

top 57.0%

This planet

12.92R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth HATS-36 b Jupiter
Radius (R⊕)1.0012.9211.21
Mass (M⊕)1.001,022.14317.83
Density (g/cm³)5.512.121.33
Surface Gravity (g)1.006.122.53
Insolation (S⊕)1.00561.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 1,022.141 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 119262291

Gaia DR2

Gaia DR2 6771542097119292928

Gaia DR3

Gaia DR3 6771542097119292928

System

HATS-36

Percentile among Gas Giant cohort

Radius 12.920 R⊕ · percentile 43 / cohort 1771
Mass 1,022.141 M⊕ · percentile 67 / cohort 1747
Orbital period 4.18 d · percentile 31 / cohort 1533
Distance 856.44 pc · percentile 84 / cohort 1759
ESI 0.130 · percentile 34 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
4.175 days
Semi-major axis
0.0523 AU
Eccentricity
0.105
Inclination
87.61 °

Year Length

A year here lasts approximately 4.18 Earth days (1.1% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0523 AU.

Transit Fingerprint

Depth

1.379 %

Duration

3.379 h

Impact parameter b

0.170

Rp / R★

0.107700

Transit midpoint (BJD)

2,457,314.4631

Photometric dip

Transit produces a flux drop of 13,791 ppm lasting ≈ 3.38 h.

Extended Orbital Architecture

Planet / star radius ratio

0.107700

Semi-major axis / stellar radius

10.320

Impact parameter (b)

0.170

RV semi-amplitude (K)

356.900 m/s

Transit mid-time (BJD)

2,457,314.4631

Angular separation (arcsec)

0.06110

Eq. Temperature

1,203K

(930 °C)

Insolation (S⊕)

561.00

Earth = 1.00

Earth Similarity (ESI)

0.130

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Bayliss et al. 2018

Instrument

Apogee 4K CCD Sensor

Publication

2018-03

Observation locale

Ground

Host System: HATS-36

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,950 K — hotter than the Sun (5,778 K)

Estimated Age

0.62 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.100 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

1.190 g/cm³

Systemic radial velocity

-24.39 km/s

Rotational v·sin i

4.98 km/s

Metallicity ratio

[Fe/H]

Distance
856.44 parsec
Light-years 2,793.32 ly
V-band magnitude
14.36 mag
Voyager-speed travel 49,260,150 yr

Multi-band Host Photometry — 15 bands

8.615.115.06B14.36V14.23Gaia14.30Kepler13.78TESS14.68Sloan g14.23Sloan r14.15Sloan i13.18J12.86H12.81K12.74W112.82W211.82W38.62W4

Astrometric Data

Parallax

1.140 mas

Total Proper Motion

7.884 mas/yr

PM Right Ascension

2.20 mas/yr

PM Declination

-7.57 mas/yr

Galactic Cartesian (pc)

x = 0.337 · y = -0.855 · z = -0.394

Equatorial (J2000)

RA 291.47870° · Dec -23.20282°

Galactic ℓ, b

15.357° · -17.592°

Ecliptic λ, β

289.667° · -1.218°

HTM-20 index

-1255567911

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